My wife and I spent four nights at the Hilton Houston Westchase in mid-May of 2005, and we had a very pleasant stay. The lobby is beautiful, with an attractive piano lounge. The room was beautiful, clean, and functional.
The only potential draw-back to this hotel is the location, which requires a bit of driving time to get to most Houston attractions. But, it is located right off of Beltway 8, and its location on Westheimer means that there is certainly no shortage of restaurant and shopping options.
When we returned home, I received a credit bill with an inappropriate charge from Hilton Houston Westchase. After e-mailing the hotel staff, they immediately refunded the amount. I was impressed with their integrity and responsiveness.
Though this hotel did not blow us away, it was a nice place, especially for the $40 per night that we paid through Priceline. I would confidently recommend this hotel to anyone.